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CALCIUM HYDROXYAPATITE.

Valuable CAS 1306-06-5 / SKIN CONDITIONING

A naturally occurring mineral form of calcium apatite that serves as a highly biocompatible biostimulator and optical refiner. It is renowned for its ability to provide structural support to the skin matrix while delivering immediate soft-focus blurring effects.

biostimulator skin conditioning soft-focus agent sunscreen booster remineralizing agent

Science

Functions as a bioactive scaffold that triggers mechanical stimulation of fibroblasts. It facilitates the release of calcium ions (Ca2+) to activate signaling pathways like TRPV4, which direct the synthesis of Type I and III collagen and elastin. Topically, its crystalline structure scatters light to blur fine lines and acts as a physical booster for UV filters.


Research

High confidence
Effective range 0.5–30%
Optimal

5%

Key findings

  1. 01 Microspheres (25-45μm) demonstrated stimulation of Type I/III collagen and elastin over a 9-month period.
  2. 02 Topical concentrations of 0.5%-1.0% in combination with chitosan significantly accelerated wound healing and cell proliferation.
  3. 03 Concentrations between 5%-10% effectively provide enamel remineralization and serve as a soft-focus optical agent.

Transparency

Commonly dusted
Min. effective
0.5%
Red flag below
0.1%

While often used at high concentrations in dermal fillers (30%), it is frequently 'dusted' in topical creams at levels below 0.1% for marketing purposes. A minimum of 0.5% is required for cellular proliferation benefits, and 1-5% for visible optical blurring.


The Formula

Solubility
Unknown
Optimal pH 5.5 – 9
0 7 14

Stability

Insoluble in both water and oils; must be formulated as a crystalline suspension. Highly heat-stable but degrades in acidic environments.

Synergies

  • Chitosan
  • Chemical Sunscreens
  • Peptides

Conflicts

  • Alpha Hydroxy Acids (AHAs)
  • Beta Hydroxy Acids (BHAs)
  • L-Ascorbic Acid
  • Acidic Fruit Extracts

Safety

CIR Status
Safe as used
Max tested
6.5%
Pregnancy
Safe
Sensitization risk Low

Listed in China's IECIC 2021 with a historical maximum usage of 6.5% for leave-on products. It is non-immunogenic and highly biocompatible.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

An exceptional multi-tasking mineral that bridges the gap between immediate optical correction and long-term structural collagen support.


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